go ganglia library

imported from: https://github.com/daaku/go.ganglia
Merge pull request #29 from maplebed/master

Adding HAProxy logtailer module
Merge pull request #28 from daaku/master

go ganglia library
Merge pull request #30 from maplebed/master

changing latency metrics from reporting millisec to seconds
adding the ganglia aggregator
adding gmetric script to submit statistics about nagios
Merge pull request #32 from maplebed/ben.nagios_ganglia_stats

adding gmetric script to submit statistics about nagios
Merge remote-tracking branch 'upstream/master'